Physics - Heat & Thermo Question with Solution | TestHub

An iron boiler with walls 1.25 cm thick contains water at atmospheric pressure. The heated surface is 2.5 m² in area and the temperature of the underside is 120°C. Thermal conductivity of iron is 20 cal s⁻¹ m⁻¹ K⁻¹ and the latent heat of evaporation of water 536 $\times 10^3$ cal kg⁻¹. Find the mass of water evaporated per hour.